Difficult
$A$ block of mass $M$ is placed on a rough surface with a coefficient of friction $\mu = 3$. If the applied force $F$ is $(4/5)$ of the minimum force required to just move the block,find the total force exerted by the ground on the block.
- A$2.6\ Mg$
- B$Mg$
- C$4\ Mg$
- D$3.4\ Mg$
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